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    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>变量的内存</title>
    <script>

/* 
        变量中并不存储任何值，而是存储值的内存地址！

*/
        let a = '哈哈'
        let b = '哈哈'

    </script>
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